The Repco Standard Bicycle Tube keeps you going for your cycling journey, in case of puncture or using it for your bicycle maintenance routine, when changing to new tyre. This tube is builtto minimise the chance of puncture with a Car or also known as Schrader valve. The 16 inches tube fits most 16 inch or 40 cm bicycle wheels, 26 inches tube fits most 26 inches or 66 cm bicycle wheels.